Interlocking bolt



' zen of the United UNITED STATES PATENT Orrrcn.

THOMAS J. BUSH, OF LEXINGTON, KENTUCKY.

lNTERLOCKING BOLT.

SPECIFICATION forming part of Letters Patent No. 361,986, dated April 26,1887. Application filed July 21, 1884. Serial No. 138,421. (No model.)

the bolt B intersects the the recess b will allow said bolt to turn partly around on its own axis, thereby bringing t e shoulder c squarely against the edge of the recess a.

As will be seen from the drawings, I contemplate using bolts curved at their upper ends, or made straight throughout, and in applying this form of my improved bolts the holes will be bored alike that is to say, they will intersect in the common plane-aud either bolt can be inserted in either hole.

A modified form adapted for use, as above described, is shown in Figs. 3 and 4, in which the bolt 0 is formed with an elongated aperture,'I), instead of a recess, a.

The bolt E is faced oif on both sides,as shown at e e, leaving the narrow wedge-like portion F, which passes readily through the aperture 1), and is recessed on both edges at the desired oint of intersection, where it is reduced to form the neck G.

In the present instance I haveshown my improved bolts as applied to secure railway-rai in position, the rails being represented at H and the cross-ties at J. When bolts with curved necks are used, an ordinary washer or fish- The nature of the improvement ,consists in so forming the interlocking recess and the plate can be used; but where they are made lower portion of one member of each pair of straight a special form of washer will be rebolts that they shall intersectinthesame plane quired, as indicated at K, and more particuand be locked by imparting a quarter-turn to larly shown and described in another applicaone of the pair, they being then tightened by tion filed by me of even date herewith. means of screw-nuts at their outer ends, as here- Having thus described my invention,what I tofore described.

claim as new is- In the drawings,

The bolt 0, formed with a passage, D, in comone of the bolts, which is formed with a transbination with the bolt E, reduced to key with verse recess, a, located near its lower end, and

the bolt 0, in combination with tie J, having preferably at right angles to the body A. intersecting diagonal holes, in which the bolts B is the second bolt, which, in addition to are inserted. a recess, b, similar in location to the one a, is In testimony whereof Iaffix my signatnrein cut away from the top of its recess to the end presence of two witnesses. of the bolt, as seen at d. This cut is made at right angles to the recess 1) and should include about half of the body of the bolt, leaving a square shoulder, c, at the bottom of the recess To aZZ whom it may concern:

Be it known that 1, THOMAS J. Busn, a citi- States, residing at Lexington, in the county of Fayette and State of Kentucky, have invented certain new and useful Improvements in Interlocking Bolts, of which the following is a specification, reference being had therein to the accompanying drawings.

The'present invention is an improvement upon the devices shown and claimed in Letters Patent Nos. 257,287, May 2,1882, 264,622, September19,1882,and 301,668, Jnly8,1884, heretofore granted to me; and it relates to certain improvements in interlocking bolts, portions thereof having been already referred to, but not claimed, in Letters Patent issued to me September 19, 1882, numbered 264,622.

Figure 1 isa sectional elevation of a cross-tie and of a rail secured thereto by a pair of my improved locking-bolts. Fig. 2 is a plan view of the bolts, showing the details of the interlocking portions. Fig. 3 illustrates a modified form,and is a sectional elevation similar to Fig. 1. Fig. 4 is a plan view showing the details of the modification shown in Fig. 3. Similar letters denote like parts.

A represents the body of THOMAS J. BUSH.

\Vitnesses:

G. M. Houen, J OHN HOWARD.

b, so that when the flattened lower portion of recess of the bolt A 

